Jigsaw



FIG. 1 is a front right perspective view of the present new design for a jigsaw;

FIG. 2 is a right elevational view thereof;

FIG. 3 is a left elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a front elevational view thereof; and,

FIG. 7 is a rear elevational view thereof.

The broken lines showing various features of a jigsaw are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a jigsaw, as shown and described. 